True triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and test method of test device

Abstract

The invention discloses a true triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and a test method of the test device, and relates to a rack mechanics test technology. The device comprises a rigid frame, an oil cylinder, a pressure sensor, a high pressure cavity, a compression column, a shear plate, a normal pressure plate, a rock sample, a plastic sleeve, a computer, a fluid injection metering pump, a fluid return metering pump, a confining pressure tracking pump, an X-direction displacement sensor, a Y-direction displacement sensor and a Z-direction displacement sensor. The method comprises the steps of preparing a rock sample; assembling a composite member; placing the composite member; connecting pipelines; loading stress; checking airtightness; adjusting the stress and temperature; injecting fluid; carrying out a shearing test; unloading the stress; cleaning the device. After the device and the method are adopted, a true triaxial shear rock mass shearing seepage test can be realized under the complicated conditions of high temperature, high stress and high seepage pressure, and the sealing problem of high permeability fluid is solved during shearing; the highest seepage pressure reaches 50MPa, and the volume and pressure of seepage fluid can be accurately controlled and measured.

Description

technical field [0001] The invention relates to rock mechanics test technology, in particular to a rock mass true triaxial shear seepage test device and method suitable for high osmotic pressure. Background technique [0002] The rock mass shearing device is a rock mechanics testing device that can directly measure the shear strength and deformation parameters of rock mass (joints). Evaluate. In recent years, with the deep expansion of underground engineering and mining engineering, groundwater has seriously affected the stability of rock mass engineering, so it is extremely important to conduct research on rock mass shear-seepage coupling. At present, a lot of research work has been carried out at home and abroad, and a variety of rock mass shear-seepage coupling test devices have been developed. However, these devices have the problem of low seepage fluid pressure and cannot break through the problem of high-pressure fluid sealing, resulting in high-pressure fluid conditi...

AI Technical Summary

Problems solved by technology

The specially designed sealing rubber sleeve can overcome the problem of difficult sealing of high-pressure fluid in the rock mass shearing process and the problem that the pressure and volume of the fluid in the rock mass cannot be accurately measured and controlled; the loading capacity of the device can meet the requirements of complete rock shearing. High stress requirements, and can realize the independent loading of stress in three directions, and can measure the deformation of rock samples in three directions with high precision, for in-depth study of seepage characteristics, shear strength, deformation failure mechanism and constitutive model and other related content provide the possibility

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